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Cheap flights from Ontario to Washington from C$ 222

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
16 Jul — 23 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 June 2026.

Sat 25/78:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Tue 28/72:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Deal found 12/6C$ 370
Fri 4/99:00 a.m.
YYZ
-
PDX
1 stop7h 50m
WestJet
Tue 8/92:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Deal found 15/6C$ 372
Tue 28/78:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Tue 11/82:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Deal found 11/6C$ 376
Wed 29/78:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Fri 28/82:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Deal found 13/6C$ 377
Sun 20/910:20 p.m.
YYZ
-
PDX
2 stops18h 30m
WestJet
Wed 30/92:30 p.m.
PDX
-
YYZ
2 stops11h 40m
WestJet
Deal found 14/6C$ 403
Sat 22/88:00 a.m.
YYZ
-
PDX
1 stop8h 50m
WestJet
Fri 28/82:30 p.m.
PDX
-
YYZ
1 stop7h 35m
WestJet
Deal found 14/6C$ 404
Fri 11/912:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Sun 20/97:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 15/6C$ 428
Fri 11/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 21/910:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 16/6C$ 429
Fri 25/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Sat 3/107:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 15/6C$ 433
Fri 24/73:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Sun 26/77:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 11/6C$ 446
Thu 1/101:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 5/107:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 15/6C$ 458
Thu 20/812:00 p.m.
YYZ
-
SEA
2 stops12h 00m
WestJet
Fri 28/87:00 a.m.
SEA
-
YYZ
2 stops11h 10m
WestJet
Deal found 11/6C$ 460

Find flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated 16 June 2026.

Round-trip from

C$ 370

One-way from

C$ 222

Popular in

June

Cheapest in

February

Average price

C$ 692

Good round-trip deal

C$ 640 or less

Good one-way deal

C$ 346 or less
WestJet
  • WestJet
  • 25/7-28/7
  • 2 total stops
  • 16h 25m total
  • Ontario to Washington
Search Deals
WestJet
  • WestJet
  • 20/8
  • 1 total stop
  • 7h 50m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Washington.
Search Deals
Price to beat on a one-way flight from Ontario to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 June 2026.
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 4/7

1:00 p.m.-6:50 p.m.

1 stop8h 50m

Portland

Tue 7/7

10:40 p.m.-9:54 a.m.

1 stop8h 14m

C$ 439

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 15/10

2:15 p.m.-9:53 p.m.

1 stop10h 38m

Portland

Mon 19/10

9:45 p.m.-12:17 p.m.

1 stop11h 32m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 15/10

4:18 p.m.-10:53 p.m.

1 stop9h 35m

Portland

Wed 21/10

8:40 a.m.-9:32 p.m.

1 stop9h 52m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 21/10

5:50 p.m.-11:51 p.m.

1 stop9h 01m

Portland

Fri 23/10

10:05 p.m.-11:14 a.m.

1 stop10h 09m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 26/9

7:00 a.m.-11:33 a.m.

1 stop7h 33m

Portland

Tue 29/9

8:25 a.m.-11:54 p.m.

1 stop12h 29m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 16/9

4:18 p.m.-10:53 p.m.

1 stop9h 35m

Portland

Tue 22/9

10:50 a.m.-12:13 a.m.

2 stops10h 23m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Thu 15/10

6:30 a.m.-10:57 p.m.

1 stop19h 27m

Portland

Mon 19/10

11:59 p.m.-2:24 p.m.

1 stop11h 25m

C$ 442

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Wed 21/10

10:45 a.m.-3:03 p.m.

1 stop7h 18m

Portland

Sat 24/10

5:00 a.m.-10:23 p.m.

2 stops14h 23m

C$ 443

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Sat 4/7

2:35 p.m.-8:19 p.m.

1 stop8h 44m

Portland

Thu 9/7

11:40 p.m.-7:37 p.m.

1 stop16h 57m

C$ 444

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Fri 4/9

4:10 p.m.-10:09 p.m.

1 stop8h 59m

Portland

Mon 7/9

11:20 p.m.-11:18 a.m.

1 stop8h 58m

C$ 471

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/6

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Ontario to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 88). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 997). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to WA?

Find hourly flight availability from Ontario to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to State of Washington as you normally would.

How much does it cost to fly round-trip from Region of Ontario to State of Washington?

How far ahead should I book a flight from Region of Ontario to State of Washington?

The price you pay for your flight from Region of Ontario to State of Washington may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 16 June 2026.
Check out reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Ontario to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,523 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Delta
7.9
Good
8,403 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
United Airlines
7.4
Good
9,842 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
WestJet
7.2
Good
3,365 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Air Canada
7.1
Good
11,197 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.0

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to State of Washington?

    For as low as C$ 439, United Airlines can have you in State of Washington from Region of Ontario in 8h 50m. Region of Ontario and State of Washington are separated by a distance of 3364 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Ontario to Washington that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington.

  • Can I find deals for business class flights from Ontario to Washington?

    Yes. Cheapflights offers flight deals from Ontario to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 88). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 997). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Washington

Discover the top 5 airlines that operate flights from Ontario to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 16 June 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 245AverageC$ 518FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 254AverageC$ 651FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 273AverageC$ 657FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 274AverageC$ 451FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 276AverageC$ 611FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Washington. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Ontario.

Can Cheapflights find flights from Ontario to Washington with no change fees?

Need flexible booking options for your flight to Washington from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Washington become cheaper?

Of course! You can now track prices for flights from Ontario to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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